What happens when CO2 gas is passed through lime water and why does it disappear on passing excess co2?
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caco3 is formed on excess co2 passing it dissolves
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5
Answer:
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Explanation:
When CO2 is passed through lime water,it
turns milky due to the formation of calcium
carbonate which is insoluble in water.
(limewater)Ca(OH)2+CO2⟶(milkiness)CaCO3+
H2O
However, when excess of CO2 is passed
through this solution, the milkiness
disappears. This is due to the formation of
calcium bicarbonate which is colorless and
soluble in water.
(milkiness)CaCO3+H2O(excess)+CO2 ->
Ca(HCO3)2
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